Switched reluctance motor

Abstract

Disclosed herein is a switched reluctance motor including a rotor having a coil wound therearound; commutators connected to both ends of the rotor; brushes mechanically contacting the commutators by rotation of the rotor; and a stator having the brushes fixed thereto and having stator poles, wherein the brushes are moved by an advance angle from a connection axis of stator poles counterclockwise, and a dwell angle, a voltage application period is controlled by arc angles of the commutator and the brush.

Description

CROSS REFERENCE TO RELATED APPLICATION[0001]This application claims the benefit of Korean Patent Application No. 10-2011-0002436, filed on Jan. 10, 2011, entitled “Switched Reluctance Motor”, which is hereby incorporated by reference in its entirety into this application.BACKGROUND OF THE INVENTION[0002]1. Technical Field[0003]The present invention relates to a switched reluctance motor.[0004]2. Description of the Related Art[0005]A general switched reluctance motor has a magnetic structure in which both of a stator and a rotor are a salient pole. In addition, the stator has a concentrated winding coil wound therearound, and the rotor is formed of only an iron core without using any excitation device (e.g., a winding, a permanent magnet, or the like) to have excellent price competitiveness. Further, a speed changeable switched reluctance motor may stably generate a continuous torque with the aid of a converter using a power semiconductor and a position sensor, and may be easily cont...

AI Technical Summary

Benefits of technology

The present invention provides a switched reluctance motor with a coil wound around a rotor and a single phase winding that generates continuous torque, reducing production costs. A space part is formed around a stator pole to increase air flow and improve performance of a cleaner. A torque performing mechanical phase conversion is generated by a commutator and a brush without using a converter and a position sensor, making it possible to be implemented by a simple mechanical structure at low cost. The motor has an optimized design for performance, reducing torque ripple and improving efficiency. The motor is controlled by changing the position and arc angles of the commutator and brush, and the brushes are moved and mounted by an advance angle from the connection axis of stator poles. The motor has a salient pole type stator and rotor and a permanent magnet.

Problems solved by technology

Even though the switched reluctance motor is inexpensive due to a simple rotor structure, it has problems in that it should use a converter formed of a semiconductor switch in order to generate a reluctance torque, has an increased cost of the entire system, and should include an expensive control circuit capable of performing rapid processing in order to appropriately perform a control during rapid driving thereof.

However, in the universal motor, the coil is wound around the rotor as well as the stator, which causes increase in a material cost and copper loss of the rotor, thereby reducing efficiency of the motor.

Therefore, it is difficult to use the universal motor in a high-end type model requiring high efficiency.

In addition, a controller having a digital signal processor (DSP), a microcontroller unit (MCU), or the like, mounted therein is required for complicated and rapid processing.

As described above, since the switched reluctance motor according to the prior art should necessarily include the converter, the controller, and the position sensor for driving thereof, it may not be implemented at a low cost, has a deteriorated degree of freedom in design due to a complicated technical configuration, and has a high possibility for a fault or an error.

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